package com.sky.service.user.impl;

import cn.hutool.core.bean.BeanUtil;
import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.mapper.admin.DishMapper;
import com.sky.mapper.common.SetmealMapper;
import com.sky.mapper.user.ShoppingCartMapper;
import com.sky.pojo.Setmeal;
import com.sky.pojo.ShoppingCart;
import com.sky.service.user.ShoppingCartService;
import com.sky.vo.DishVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void addShopCar(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtil.copyProperties(shoppingCartDTO, shoppingCart);
        //只能查询自己的购物车
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //判断 当前菜品或套餐是否在购物车中
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if (shoppingCartList != null && shoppingCartList.size()==1) {
            shoppingCart = shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()+1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }else {
            //判断添加的是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                //添加的是菜品
                DishVO byId = dishMapper.getById(dishId);
                shoppingCart.setName(byId.getName());
                shoppingCart.setImage(byId.getImage());
                shoppingCart.setAmount(byId.getPrice());
            }else {
                //添加的是套餐
                Setmeal setmeal = setmealMapper.getById(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);

        }

    }

    @Override
    public List<ShoppingCart> showShoppingCart() {

        List<ShoppingCart> shoppingCartList = shoppingCartMapper.selectByUserId(BaseContext.getCurrentId());

        return shoppingCartList;
    }

    @Override
    public void cleanShoppingCart() {
         shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
    }

    // 修改后代码（增加数量递减逻辑）
    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtil.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        shoppingCartMapper.list(shoppingCart);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList != null && shoppingCartList.size()==1) {
            shoppingCart = shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()-1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }
        if (shoppingCart.getNumber() == 0) {
            shoppingCartMapper.deleteById(shoppingCart.getId(), BaseContext.getCurrentId());
        }
    }

}
